I would be interested in seeing your data. I have found that what the cell manufacture says and what really happens are two different things.

Reminds me of what happened to me in the early 1980's. A friend of mine was an Engineering manager who knew I was into high powered electric models. He got me a brand new 24 volt DC 1.5 Amp Hour Nicad battery Engineering sample from a well known Nicad battery supplier that was rated for 35 amperes continuous discharge current.

I grabbed it, ran a test at 28 Amps, and the voltage immediately dropped to 0.64 volts per cell. It melted the shrink wrapping off the cells. The manager contacted the supplier, who responded "That 35 Amps is a calculated value, we never test at that current!"